MIS Chapter 5

Database

Management

Types of Malware• Viruses

– Self-replicating– E-mail propagation

• Trojans– Piggyback on a program– Often pretend to be Antivirus Programs

• Worms– Attack networks

• Spyware– Keyloggers, browsing history.

Malware Protection• Keep your software up-to-date.• Verify the source.• Don’t be click – happy.• Use your gut sense. • Install ONE good antivirus.

Databases• A structured collection of integrated records• Hierarchy of data elements

– Data are grouped into columns/fields

– Columns grouped into rows/records

– Rows are grouped into tables/files

• Collection of tables plus relationships among rows

Example Table

Relationships

• Values in one table may relate to rows/records in other tables

• Keys – Column(s) that identify unique row in table– Each table has a key

• Foreign keys– Keys of a different table than the one in which they reside

• Relational databases– Databases using tables, keys, and foreign keys

•A Database is a structured collection of records or data that is stored in a computer system so that a computer program or person using a query language can consult it to answer queries.

•The computer program used to manage and query a database is known as a database management system (DBMS).

Database vs. DBMS

Database Systems

Types of DBMS

• Personal DBMS products– Microsoft Access– Everything in one package

• Enterprise DBMS products– IBM: DB2– Microsoft: SQL Server– Oracle– MySQL (open source)

Database Systems

• DBMS used to create tables, relationships in databases.

• Applications use DBMS to read, insert, modify, and delete data– Structured Query Language (SQL

Database Applications

Database Applications

• Forms– Used to read, insert, modify, and delete data

• Reports– Show data in structured context

– May compute values

• Queries– Are a means of getting answers from database data